Calculating-machine.



M. TEET'OB. CALCULTINGMACHINE. APPLIcATmN mtu' Ammo. l'soa.

Patented Jan. 8, 1918.

QM. Timon. CALCULATING MACHINE. APPLICATIUN FILED APR. 20. 908.

Patented Jan. 8,1918

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APPLICATION FILED APR.20.190B.

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Patented Jan. y3, 1918.

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4Patented Jam 8, 1918.

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Patented Jan. 8,1918` x9 SHEETS-saam s.:

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CALCULATING MACHINE. APPLlcmQN nl gu APR.20`. 190s.4

Patented Jan. 8, 1918.

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Patented Jan. 8, 1918.

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19 BHEBTB- nSHEET 19- Ml/ @@"muf UNITED sTATs MARTIN TEMOR, or pas MOINES, IOWA,J AssIGNOR To "ITOR COMPANY, OF Das MOINES, IOWA, A CORPORATION OF IOWA.

oALcULArING-MACHINE.

Application med April 2o,

To ctlZ 'uf/0m z5 may concern.'

Be lit known that l` M AufrIN Tnn'ron, aY citizen ol the United States, rcsidmg at Des Moines, in the county of Polk and State. of

lowa, have invented g1 certain new and use-v ful. Calculating-Machine, of which the Jfolliowingi is a specification,

M y `invention relates more particularly to that 4class of calculatingr machines designed to vl'rcrform the. functions of adding, subtractingr` and taliulating numbers, in which y the. scope oi the machine is practically un- -further to control b2.'

limited, and in which nearly all of the driving movements of the `device are controlled h v positive driving mechanisms.

It is my purpose to prdvide a machine.l for connnercial use coll'lparatively simple,

' and'so coi'istructed that the most complicated parte of the device may be removed in sections so that if vone of these sections gets out of order, another one may be readily substituted Ltl'lerefor and the machine kept in use while the part aiected isbeing repaired, and

' l positive mechanisms the various parts'of the devi e during their operation so that there will be` olikelihood of thc more delicate parts being broken by the manipulation of the machine.

The abime.

The Objects of my invention are to provide a commercial calculatin lmachine having in its construction mechanisms of thesimplest character possible, so adapted and arranged as to be automatically Operated and coju- .fo'lled thrbu the movement of eitherV the `iddingr'or sulitracting leversafter the keys have thrown these `parts into position Where the operation desired is attained, and fur- `ther tosc simplify the mechanical construction of this class,of machines as to make amount of adjustment and repair, and render them less liable to get out of. order, thereby eliminatinef, to a large extent, mistakes In theirl `vvor 1, and providing for the I 'eady correction of any mistakes that may belnade, :Welles to `ecp them out Of the repair shopby so arranging theJpar-ts that they may be `more readily understood by the ordinary userof the machine, thus enabling the machine` to stand commercial usage, and at the. same time be rapid, 'accu- Specification of Letters Patent.

. keys at the VVkeys 4in their upper limits Patented Jan. 8, 1918. 190s. serial No. 427,999.

rate and positive in the various movements necessary foradding, subtracting and listingeither collectively or separately.

A further object is to provide @series of rows of keys, each 'row running longitudinally of the machine and" arranged parallel with each other for convenience in operation.

A further object is to provide a safety device which Will prevent the operation of two same time in a single-row ot' keys, and will also prevent a second key being set after one key has been set in that row, and thus' eliminate complications in the adding mechanisms, thereby obviating errors 'of the calculating mechanisms as well as thedangerofbreakage of these parts.

A further Objectis to provide a mechanism for operating the calculating-Wheels, Which mechanism is driven by' pin( connections, to provide a positive drive not dependent upon springs; 4

A further object is to provide a 'mechanisn'rfor positively rctllrning the keys to their normal position, aside from the spring actuated mechanisms which ordinarily turn these keys, thus securing a more perfect and positive operation of the parts. 'I

A. further object is to provide single rock sha-ft upon 'which all of the pin retaining bars are moul'lted, and upon which -allfofthese partsare adapted to swing simultaneously as the operating levers `are manipulatedf 'y Y A further Object to provide asafety lock for preventing aznyo'f the parts of the machine from being` :operated if any given key has been accidentally or 'otherxvise moved to a partially setnosition; that is. if any -given key is` moved to a partially set position, I myfsafety lock devicepreventsA the adding orf subtractinglevers, which control the voperation of the calculating meclanism, frombeing'manipulated. K y

Afurtherfobject is to provdemeans for regulatingthe speed oft e operative parts of the device, regardless ofthernpidity 'with which` the Operating levers are manipulated.

A Afurther object Isv to ,provide means operated by the' totaling button for locking the of movement while the totals'are being taken and prin-ted.

A further object is to provide a series of uit 

